Angles Review and Revision
Straight Angles
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Triangle Angles
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Quadrilateral Angles
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Session One:
By the end of the session you should be able to:
As we know. angles on a straight line always equal 180º. We have done a fair bit of work on this, so please complete these questions as a review before you continue on. If you have any questions, please come and see one of the teachers. Same as usual, you need to rule up a page in your maths book, entitled 'Angles - Straight lines.'
By the end of the session you should be able to:
- Find the missing angle on a straight line, using the knowledge that a straight line is 180º
- Find the missing angle of a triangle, using the knowledge that the interior angles of a triangle equal 180º
- Find the missing angle of a quadrilateral, using the knowledge that the interior angles of a quadrilateral equal 180º
As we know. angles on a straight line always equal 180º. We have done a fair bit of work on this, so please complete these questions as a review before you continue on. If you have any questions, please come and see one of the teachers. Same as usual, you need to rule up a page in your maths book, entitled 'Angles - Straight lines.'
Triangles.
The interior angles of a triangle equal 180º. As shown in the diagram to the left. If all the angles are added together in MUST equal 180º.
Remember we can prove that the interior angles of a triangle equal 180º. We could use a protractor, OR if we ripped of the three corners of a triangle and place them together they will form a straight line, which we all know equals 180º! I have attached a more detailed explanation HERE if you would like it explained in another way. |
Below you will find a series of triangle diagrams where there are angles missing. You need to find what these missing angles are. You are to rule up your maths book, and put the title of 'Missing Angles - Triangles' at the top. You are to complete the first THREE questions, and then have your answered checked by a teacher to make sure you are on the right track. Once you have done that you need to type your answers into THIS google form. You DO NOT need to put in the degrees sign, simply use numbers. e.g. if the missing angle is 46º put it in the form as 46.
Click HERE to access the worksheet.
Click HERE to access the worksheet.
Quadrilaterals
The interior angles of a quadrilateral equal 180º. As shown in the diagram to the left. If all the angles added together they MUST equal 360º. Remember that we can prove that the interior angles of a quadrilateral equal 360º. We could use a protractor, OR if we we ripped off the four corners of a quadrilateral and place them together, they would form a circle which we all know has internal angles which equal 360º as well! Below you will find a series of quadrilateral diagrams where there are angles missing. You need to find what these missing angles are. You are to rule up your maths book, and put the title of 'Missing Angles - Quadrilaterals' at the top. You are to complete the first THREE questions, and then have your answered checked by a teacher to make sure you are on the right track. Once you have done that you need to type your answers into THIS google form. You DO NOT need to put in the degrees sign, simply use numbers. e.g. if the missing angle is 46º put it in the form as 46. Click HERE to access the worksheet. |
If you manage to finish all the above work, click HERE to access the extension work. For this work you are trying to find out if there is an easy way to know the value of the interior angles of ANY shape. What would the angles inside a pentagon add upto? How about a decagon? Work through and you will find out!